The image is broken? I cannot see the example.
To make clothes distort like this is usually difficult. This is usually a "vertex morph". To make a vertex morph is easy. To make a good vertex morph is very difficult.
To make a new "vertex morph" in PMXEditor:
1. in View window, Edit(E) > Morph Editor(K)
2. click "Start Edit" button
3. move the clothing vertex in the View window (this is the hard part), push the bra up, lift the shirt, etc
4. click "Append" button
5. click "Start Edit" button again to stop morph edit mode
I hope this helps a little bit!